820622 has 12 divisors (see below), whose sum is σ = 1353408. Its totient is φ = 372900.

The previous prime is 820619. The next prime is 820627. The reversal of 820622 is 226028.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 820594 and 820603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1454 + ... + 1937.

It is an arithmetic number, because the mean of its divisors is an integer number (112784).

2⁸²⁰⁶²² is an apocalyptic number.

820622 is a deficient number, since it is larger than the sum of its proper divisors (532786).

820622 is a wasteful number, since it uses less digits than its factorization.

820622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415 (or 3404 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 820622 is about 905.8818907562. The cubic root of 820622 is about 93.6226763428.

It can be divided in two parts, 8206 and 22, that added together give a palindrome (8228).

The spelling of 820622 in words is "eight hundred twenty thousand, six hundred twenty-two".